Re: problema \overline con beamer

Ecco il preambolo:

\documentclass{beamer}
\usepackage[italian]{babel}
\usepackage[ansinew]{inputenc}
\usepackage{amsthm}
\usepackage[bottom]{footmisc}
\usepackage{setspace}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{graphicx}
\usepackage{setspace}
\usepackage{relsize}
\usepackage{float}
\usepackage{booktabs}
\usepackage{caption}
\usepackage{listings}
\usetheme{Warsaw}
\setbeamercovered{transparent}
\usecolortheme{orchid}
\useinnertheme{default}

\begin{document}
…..
\end{document}

Romina.